文献类型：期刊文献

英文题名：Conjugated poly(aryleneethynylenesiloles) and their application in detecting explosives

作者：Shu, Weifu;Guan, Changwei;Guo, Wenhao;Wang, Chengyun[1];Shen, Yongjia

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2012

卷号：22

期号：7

起止页码：3075

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY

收录：;EI(收录号：20120714762419);WOS:【SCI-EXPANDED(收录号:WOS:000299504200036)】；

基金：This work was supported by National Natural Science Foundation of China (No. 20872035, 21076078), Specialized Research Fund for the Doctoral Program of Higher Education (No. 20070251018).

语种：英文

外文关键词：Explosives detection - Chemical reactions - Quenching

摘要：Hyperbranched and linear conjugated polysiloles incorporating arylene ethynylene subunits (6 and 7) were synthesized by the Sonogashira reaction. The two polymers possess unusual phenomena of PL, with gradual addition of water in their THF solution, the intensity of PL firstly increased and then decreased, this may be due to the aggregate-enhanced emission (AEE) effect and aggregation-caused quenching (ACQ) effect. The polymers function as sensitive fluorescent chemosensors for the detection of explosives, such as picric acid (PA) and TNT. The quenching constants of 6 for PA and TNT were 4.7 x 10(-2) ppm(-1) and 4.6 x 10(-3) ppm(-1), respectively. The quenching constants of 7 for PA and TNT were 8.6 x 10(-2) ppm(-1) and 6.5 x 10(-3) ppm(-1) respectively. The polymer 7 has more detective efficiency for PA and TNT than that of polymer 6, this may be due to the less steric hindrance.